Effektkombinering av THz oscillatorer

Research Project, 2018 – 2021

The aim of this project is to bridge the THz-gap by demonstrating an integrated array of Resonant Tunneling Diode (RTD) oscillator sources.The next generation of space instruments in search for our origin will carry large arrays of ultra-sensitive THz receivers in order to achieve three orders of magnitude gain in sensitivity and higher angular resolution over previous far-infrared missions. However, due to size and power consumption constrains onboard a satellite, the generation and distribution of the local oscillator (LO) signal is one of the most challenging tasks to solve.Recently, progress in antenna integrated RTDs shows fundamental oscillation up to 1.9 THz, delivering microwatt power, and for a relative low power consumption of ca 10 mW. RTD oscillators is therefore an interesting candidate for use in large heterodyne arrays, and where the overall power consumption is of great concern.For the first time, we will demonstrate spatial power combining of RTD oscillators in order to increase the output power as well as explore fundamental limitations in terms of output power and frequency. Based on this overall objective, we work toward the following specific goals:Understand and investigate the theoretical limitations of the output power;Integration of RTDs on silicon or diamond to minimise self-heating effects and high frequency losses;Demonstrate spatial power combing of RTDs in an enclosed waveguide with the goal to generate more than 10 mW of output power at 1 THz.